package com.learn;

public class num_28 {
    public static int strStr(String haystack, String needle) {
        if (haystack == null && needle == null) {
            return 0;
        }


        return -1;
    }

    public static void main(String[] args) {
        String s="hello";
        String s1="";
        System.out.println(s.indexOf(s1));

    }
}
